Ubuntu Guide shows you how to reset Unity in Ubuntu 12.10 Quantal
This simple tutorial is going to show you how to reset your Ubuntu 12.10 Unity desktop to the default settings if something goes wrong. The "unity --reset" command used to reset Unity in previous Ubuntu version won't work in Ubuntu 12.10, here's the new way to do this, which also work in Ubuntu 12.04.How to Reset Unity in Ubuntu 12.10 Quantal
